Ink jet recording sheet

Abstract

An ink jet recording sheet having an excellent jet ink-fixing property and heat-sealing property and capable of recording thereon ink images having excellent water resistance and light fastness has an ink receiving layer formed on a surface of a support sheet and including a binder and fine particles of a water-insoluble, amino group-containing resin having a total amine value of 5 to 500 and preferably a glass transition temperature of 15 to 250° C.

What is claimed is:  
     
       1. An ink jet recording sheet comprising a support sheet, and an ink receiving layer formed on a surface of the support sheet and comprising a binder and fine particles of a water-insoluble, amino group-containing resin which is a reaction product of a compound having at least one epoxy group per molecule of the compound with a compound having at least one amino group per molecule of the compound and having a total amine value of 5 to 500 and mixed with the binder, the ink receiving layer having pores formed between the water-insoluble, amino group-containing resin particles and exhibiting enhanced ink-absorbing properties. 
     
     
       2. An ink jet recording sheet as claimed in claim  1 , wherein the water-insoluble, amino group-containing resin has a glass transition temperature of 15 to 250° C. 
     
     
       3. The ink jet recording sheet as claimed in claim  1 , wherein the epoxy group-containing compound is selected from those of the formulae (1) and (2):                    
       wherein —O—R 1 —O— and —O—R 2 —O— respectively and independently from each other represent a member selected from the group consisting of residues of aromatic dihydroxyl compounds and residues of aliphatic dihydric alcohols; k and l respectively and independently from each other represent an integer of 0 or 1 or more; —O—R 3 — represents a residue of a monohydroxyaryl compound; Y 1  and Y 2  respectively and independently from each other represent a member selected from the group consisting of a hydrogen atom, halogen atoms, glycidyl ether groups, alkyl groups, aryl groups, and aralkyl groups, the alkyl, aryl and aralkyl groups respectively may be substituted with at least one glycidyl moiety; and n and m respectively and independently from each other represent an integer of 0 or 1 or more. 
     
     
       4. The ink jet recording sheet as claimed in any of claims  1 ,  2  and  3 , wherein a surface of the support sheet which is opposite to the surface on which the ink receiving layer is formed, is capable of heat bonding to the ink receiving layer and/or the ink receiving layer is capable of heat bonding at portions thereof to each other. 
     
     
       5. The ink recording sheet as claimed in claim  1 ,  2  and  3 , wherein a surface of the support sheet which is opposite to the surface on which the ink receiving layer is formed, is coated with a heat-sealing layer comprising a hot melt-bonding resin. 
     
     
       6. The ink jet recording sheet as claimed in claim  1 ,  2  and  3 , where the water-insoluble, amino group-containing resin particles have an average particle size of 0.05 to 10 μm. 
     
     
       7. The ink jet recording sheet as claimed in claim  1  or  2 , wherein the water-insoluble, amino group-containing resin particles are ones prepared by pulverizing the resin by an emulsify-dispersing method. 
     
     
       8. The ink jet recording sheet as claimed in claim  1 , wherein the binder comprises a water-soluble polymeric material. 
     
     
       9. The ink jet recording sheet as claimed in claim  8 , wherein the water-soluble polymeric material for the binder comprises at least one member selected from the group consisting of starch, oxidized starch, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, polyvinyl alcohol, modified polyvinyl alcohols, styrene-maleic anhydride copolymers and ethylene-maleic anhydride copolymers.